My wife is completely cool with my use and she was the same exact way. Everything was due to AAS the minute I took my first injection, same kind of stuff you are mentioning. What I did was I started beating her to the punch and blaming ridiculous things on the AAS, making her laugh. Then I started blaming her ailments and my AAS use. That was the kicker, and after that she couldn't seriously blame anything on steroids any more without the both of us snickering and her sounding ridiculous.
My parents, on the other hand, I will never tell, and I will straight up lie if I am asked because, however right thinking they are in everything else, they are completely media-brainwashed about this issue. But you know what? No one can prove you are using, short of a drug test. So just let them no that you don't appreciate being asked a question that is a catch-22 for you. If you deny, you are suspected of lying, if you admit, then you are a bad guy, too. It's not fair to you and all they can do is trust you.
Now if you have already admitted it. Well, now it becomes your responsibility to educate them.